Compute if a layer is clipped outside CalcDrawProps

cc/layers/layer_impl.h

Index: cc/layers/layer_impl.h
diff --git a/cc/layers/layer_impl.h b/cc/layers/layer_impl.h
index 3635a3ab53aea9abef6145aecb6e546732ab13d1..a24608ce1f7dfbb62f561a588da4d02318735bf1 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -183,6 +183,12 @@ class CC_EXPORT LayerImpl : public LayerAnimationValueObserver,
     return should_flatten_transform_from_property_tree_;
   }
 
+  void set_is_clipped(bool is_clipped) {
+    is_clipped_ = is_clipped;
+    SetNeedsPushProperties();
+  }
+  bool is_clipped() const { return is_clipped_; }
+
   void UpdatePropertyTreeTransform();
   void UpdatePropertyTreeOpacity();
   void UpdatePropertyTreeScrollOffset();
@@ -393,7 +399,6 @@ class CC_EXPORT LayerImpl : public LayerAnimationValueObserver,
     return draw_properties_.screen_space_opacity_is_animating;
   }
   bool can_use_lcd_text() const { return draw_properties_.can_use_lcd_text; }
-  bool is_clipped() const { return draw_properties_.is_clipped; }
   gfx::Rect clip_rect() const { return draw_properties_.clip_rect; }
   gfx::Rect drawable_content_rect() const {
     return draw_properties_.drawable_content_rect;
@@ -764,6 +769,7 @@ class CC_EXPORT LayerImpl : public LayerAnimationValueObserver,
   bool double_sided_ : 1;
   bool should_flatten_transform_ : 1;
   bool should_flatten_transform_from_property_tree_ : 1;
+  bool is_clipped_ : 1;
 
   // Tracks if drawing-related properties have changed since last redraw.
   bool layer_property_changed_ : 1;